Am not so sure, unless there is big blockbusters ala GT6 and GTA6(Which wont happen due to long development cycles) coming out it wont average what you expect during the May - September months. By which point the hype would quiet down and demand will be satisfied. Don't underestimate the current generation, it will have beast holiday season in 2014 due to offers, but beyond that I can see most adapters waiting till inevitable price drop in 2015.
GT5 should have been adapted for PS4. As it stands the multiplat games will still come out on the X360/PS3 and most of the first party games due this year won't be significant system movers. Can't pinpoint the numbers myself, but highly doubt it will hit 20 million by the end of 2014, maybe March/May next year.
Disconnect and self destruct, one bullet a time.
